Multistage pump ( Vertical multistage centrifugal pump) - common installation errors and the related solutions

vertical multistage centrifugal pump during the installation process will install incomplete as a result of negligence, influence of vacuum pump performance in the future. Next, we will analyse the common under vertical multistage centrifugal pump installation errors and the related solutions.

a, conduit road more elbow

if use more elbow in the water on the road, will add some water proofing property. In addition, the elbow should be along the straight direction, does not allow its along the horizontal direction, so as to avoid accumulation of air.

2, when the device enters the water, will level or rise up

this will accumulate in the inlet pipe air, reduce the vacuum degree of vacuum pump, water pipe and water reduce water vacuum water pump suction head, and to reduce water yield. The correct method is: the level of parts should be slightly biased towards the water, should not be horizontal, cannot lift.

3, directly connected to the elbow into shuikou

this makes the water is not evenly distributed through the elbow and enter the impeller. When the diameter of the inlet pipe is greater than the water pump when the diameter of the nozzle, should install reducer. Some migraine pressure reducer plane should be installed at the top, slope should be installed on the bottom. Otherwise, will collect the air, reduce the output or pumping water, and the voice. If the diameter of the inlet pipe and water vacuum pump inlet nozzle is flat, should be in the water pump inlet nozzle and increase a one-way pipe between bend. The length of the straight tube shall not be less than 2 to 3 times the diameter of the pipe.

4, outlet pipe is higher than the normal water level of the outlet pond and a

if the output nozzle is higher than the normal water level of tank, increase water vacuum pump head, but to reduce the traffic. If the terrain conditions, it is necessary to make the nozzle is higher than that of water tank water level, should be installed in the pipe mouth Angle and short tube, in order to make the pipe siphon and the height of the down nozzle.

5, the inlet pipe inlet

1) entrance pipe inlet nozzle and the distance between the entry at the bottom of the pool and wall is less than the diameter of the inlet nozzle. If there is dirt, and other dirt at the bottom of the pond, into the nozzle at the bottom of the pond and the distance between the bottom of the pond is smaller than the diameter of the 1. 5 times, this will lead to water or water absorption effect is poor in the process of pumping debris accumulation, prevent the gate to enter.

(2) the inlet pipe nozzle inlet if the water depth is not enough, will produce eddy current around the inlet pipe, which affects water inlet and reduce water. The correct installation method is: the depth of the small and medium-sized water pump should be not less than 300 ~ 600 mm, the depth of large water pump should be not less than 600 ~ 1000 mm.

6, set up the bottom valve, the bottom of the feed line is not straight

in this device, the valve itself can't shut down, resulting in leakage. The correct installation method is: feed line equipped with a bottom valve, the next section, the best is straight. If because of the terrain to straightening equipment, pipe axis and the Angle between the horizontal plane should be greater than 60 °.

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